.ads-position {
  overflow: auto;
  position: relative;
  width: 400px;
  height: 280px;
  outline: 1px solid #3c9;
  box-sizing: border-box;
}
.ads-position ul {
  padding: 200px 0;
}
.ads-position li {
  position: sticky;
  height: 40px;
  line-height: 40px;
  text-align: center;
  color: #fff;
}
.ads-position li:nth-child(1) {
  top: 0;
  z-index: 9;
  background-color: #f66;
}
.ads-position li:nth-child(2) {
  top: 40px;
  z-index: 9;
  background-color: #66f;
}
.ads-position li:nth-child(3) {
  background-color: #f90;
}
.ads-position li:nth-child(4) {
  bottom: 0;
  z-index: 9;
  background-color: #09f;
}
.ads-position li:nth-child(5) {
  bottom: 40px;
  z-index: 9;
  background-color: #3c9;
}
.jsxifubox {
  position: relative;
  overflow: auto;
  height: 280px;
}
.jsxifubox .searchBox {
  position: absolute;
  top: 50px;
}
